Carbon oxygen lance nozzle

Abstract

The utility model discloses a carbon oxygen lance nozzle which comprises a carbon powder tube, an oxygen tube is sleeved outside the carbon powder tube, the front ends of the carbon powder tube and the oxygen tube are both connected with a sealing end head, a carbon powder hole communicated with the carbon powder tube is formed in the center of the sealing end head, and a first oxygen hole and a second oxygen hole communicated with the oxygen tube are formed around the carbon powder hole; the first oxygen holes obliquely extend in the direction away from the carbon powder holes, and the second oxygen holes obliquely extend in the direction close to the carbon powder holes. Carbon powder is blown into molten steel to participate in chemical reaction by using one path of oxygen, so that the utilization rate of the carbon powder is greatly improved, the material waste is reduced, and the smelting cost is reduced; meanwhile, the other path of oxygen is used for stirring molten steel, so that the temperature in the electric furnace is uniform, the molten steel quality is improved, and energy conservation and consumption reduction are achieved.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking technology, and in particular to a carbon-oxygen lance nozzle. Background Technology

[0002] Short-process electric arc furnace steelmaking technology has been widely promoted. Currently, carbonization of molten steel is generally achieved by adding carbonaceous materials directly above the slag layer. Since carbonaceous materials are light in weight, they can only float on the slag layer and have difficulty penetrating the slag layer to contact the molten steel. Therefore, the utilization rate of carbonaceous materials is relatively low. Utility Model Content

[0003] To address the above-mentioned technical problems, this invention provides a carbon-oxygen lance nozzle. This carbon-oxygen lance nozzle can effectively improve powder utilization, reduce smelting costs, and improve the quality of molten steel.

[0004] This utility model is achieved by adopting the following technical solution.

[0005] A carbon-oxygen nozzle includes a toner tube and an oxygen tube sleeved over the toner tube. The front ends of both the toner tube and the oxygen tube are connected to a sealing head. A toner hole communicating with the toner tube is formed in the center of the sealing head. A first oxygen hole and a second oxygen hole communicating with the oxygen tube are formed around the toner hole. The first oxygen hole extends obliquely away from the toner hole, and the second oxygen hole extends obliquely towards the toner hole.

[0006] Furthermore, the angle between the axis of the first oxygen pore and the axis of the toner pore is 10-15°.

[0007] Furthermore, the angle between the axis of the second oxygen pore and the axis of the toner pore is 5-8°.

[0008] Furthermore, an outer wall tube is provided outside the oxygen tube, and the front end of the outer wall tube is connected to the end cap.

[0009] Furthermore, a spacer tube is installed between the oxygen tube and the outer wall tube.

[0010] This application has the following beneficial effects.

[0011] This invention utilizes one oxygen supply to blow carbon powder into the molten steel to participate in the chemical reaction, greatly improving the utilization rate of the carbon powder, reducing material waste, and lowering smelting costs. Simultaneously, another oxygen supply is used to agitate the molten steel, ensuring uniform temperature within the electric furnace, thus saving energy and reducing consumption. This invention accelerates material transport, reduces smelting costs, and improves the quality of molten steel from a smelting process perspective, making it highly practical. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2This is a side view of the present invention;

[0014] Figure 3 yes Figure 2 Cross-sectional view along the CC line;

[0015] Figure 4 yes Figure 2 Cross-sectional view along the DD line.

[0016] Among them, 1. Toner tube; 2. Oxygen tube; 3. Spacer tube; 4. Outer wall tube; 5. End cap; 51. Toner hole; 52. First oxygen hole; 53. Second oxygen hole. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-4 As shown, a carbon-oxygen gun nozzle includes a carbon powder tube 1, an oxygen tube 2, a spacer tube 3, an outer wall tube 4, and a sealing head 5.

[0019] The carbon powder tube 1 is used to spray carbon powder into the molten steel. An oxygen tube 2 is installed outside the carbon powder tube 1, and the oxygen tube 2 is used to spray oxygen into the molten steel.

[0020] An outer wall tube 4 is installed outside the oxygen tube 2, forming a cooling chamber between the oxygen tube 2 and the outer wall tube 4. A spacer tube 3 is installed inside the cooling chamber. The cooling medium enters the cooling chamber from the rear end of the carbon-oxygen lance, is deflected at the head end of the carbon-oxygen lance nozzle, and then exits from the rear end of the carbon-oxygen lance, carrying heat out of the lance body and achieving cooling of the lance body.

[0021] The front ends of the toner tube 1, oxygen tube 2, and outer wall tube 4 are all connected to the end cap 5. The end cap 5 contains a toner hole 51, a first oxygen hole 52, and a second oxygen hole 53.

[0022] Specifically, the carbon powder hole 51 is located in the center of the end cap 5 and is connected to the carbon powder tube 1. Carbon powder is sprayed out from the carbon powder hole 51 into the molten steel.

[0023] After the carbon powder is ejected from the carbon powder hole 51, the presence of steel slag on the surface of the molten steel makes it difficult for the carbon powder to penetrate deep into the molten steel, thus preventing it from reacting sufficiently with impurities in the molten steel. To address this issue, this application provides a first oxygen hole 52 and a second oxygen hole 53 around the carbon powder hole 51. Both the first oxygen hole 52 and the second oxygen hole 53 are connected to the oxygen pipe 2, allowing the carbon powder to penetrate deeper into the molten steel by blowing oxygen.

[0024] The first oxygen hole 52 is inclinedly disposed around the carbon powder hole 51, and the first oxygen hole 52 is inclined away from the carbon powder hole 51. The outwardly inclined first oxygen hole 52 can stir the molten steel, raise the temperature of the low-temperature zone, and make the temperature of the molten steel in the furnace more uniform, thereby achieving energy saving and consumption reduction.

[0025] The second oxygen hole 53 is also inclined around the carbon powder hole 51, but the inclination direction of the second oxygen hole 53 is opposite to that of the first oxygen hole 52. The second oxygen hole 53 is inclined towards the carbon powder hole 51. The inwardly inclined second oxygen hole 53 can blow away the slag layer and help the carbon powder penetrate deeper into the molten steel.

[0026] Preferably, the tilt angle of the first oxygen pore 52 is 10-15°, that is, the angle between the axis of the first oxygen pore 52 and the axis of the toner pore 51 is 10-15°; the tilt angle of the second oxygen pore 53 is 5-8°, that is, the angle between the axis of the second oxygen pore 53 and the axis of the toner pore 51 is 5-8°. The tilt angles of the first oxygen pore 52 and the second oxygen pore 53 can be determined according to the actual application conditions.

[0027] In actual use, the oxygen flow rate in the first oxygen hole 52 of this carbon-oxygen lance nozzle needs to be greater than the oxygen flow rate in the second oxygen hole 53. The smaller oxygen flow rate in the second oxygen hole 53 can prevent the carbon powder from being blown away by the oxygen and ensure that the carbon powder can smoothly enter the molten steel.

[0028] This application cleverly designs the internal structure of the nozzle to alter the oxygen blowing mode. One oxygen orifice blows carbon powder, breaking up the slag layer and introducing the carbon powder into the molten steel; the other oxygen orifice stirs the molten steel, raising the temperature in the low-temperature zone, thus saving energy and reducing consumption. The change in the position of the oxygen orifice also prevents slag from being blown towards the furnace door or taphole.

[0029] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A carbon-oxygen nozzle, comprising a carbon powder tube (1), an oxygen tube (2) sleeved on the carbon powder tube (1), the front ends of both the carbon powder tube (1) and the oxygen tube (2) being connected to a sealing head (5), characterized in that: A toner hole (51) communicating with the toner tube (1) is formed in the center of the end cap (5), and a first oxygen hole (52) and a second oxygen hole (53) communicating with the oxygen tube (2) are formed around the toner hole (51); the first oxygen hole (52) extends obliquely away from the toner hole (51), and the second oxygen hole (53) extends obliquely towards the toner hole (51).

2. The carbon-oxygen gun nozzle according to claim 1, characterized in that: The angle between the axis of the first oxygen pore (52) and the axis of the carbon powder pore (51) is 10-15°.

3. The carbon-oxygen gun nozzle according to claim 1, characterized in that: The angle between the axis of the second oxygen pore (53) and the axis of the carbon powder pore (51) is 5-8°.

4. A carbon-oxygen lance nozzle according to claim 1, characterized in that: An outer wall tube (4) is provided outside the oxygen tube (2), and the front end of the outer wall tube (4) is connected to the end cap (5).

5. A carbon-oxygen nozzle according to claim 4, characterized in that: A spacer tube (3) is also provided between the oxygen tube (2) and the outer wall tube (4).

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